Ba0.5Sr0.5Co0.8Fe0.2O3−δ thin film microelectrodes investigated by impedance spectroscopy

Baumann, F.; Fleig, Jürgen; Habermeier, H.–U.; Maier, Joachim

doi:10.1016/j.ssi.2006.07.057

Cited by 178 publications

(135 citation statements)

References 14 publications

Supporting

Mentioning

125

Contrasting

Order By: Relevance

“…Baumann et al [5,6] , and SSC cathodes. The authors showed that among these cobaltites and ferrites, BSCF has the lowest surface exchange resistance; for example, electrochemical surface exchange at a BSCF microelectrode was 50 times lower than at a similar LSCF microelectrode.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Composite cathode materials Ag-Ba0.5Sr0.5Co0.8Fe0.2O3 for solid oxide fuel cells

Mosiałek

Dudek

Michna

et al. 2014

J Solid State Electrochem

View full text Add to dashboard Cite

Silver-Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) cathodes were prepared in two ways. In the first method, Ag-BSCF composite powder was prepared in ethanol solution, where Ag nanoparticles serving as a component in the preparation of Ag-BSCF composite cathodes had been previously obtained via one-step synthesis in absolute ethanol using a neutral polymer (polyvinylpyrrolidone). To the best of our knowledge, this is the first study to use a Ag sol obtained by the above method for preparation of Ag-BSCF composite powder. Then, a paste containing this powder was screen-printed on a Sm 0.2 Ce 0.8 O 1.9 electrolyte and sintered at 1,000°C. In the second technique, an aqueous solution of AgNO 3 was added to a previously sintered BSCF cathode, which was then sintered again at 800°C. The oxygen reduction reaction at the quasi-point BSCF cathode on the Sm 0.2 Ce 0.8 O 1.9 electrolyte was tested by electrochemical impedance spectroscopy at different oxygen concentrations in three electrode setup. The continuous decrease of polarization resistance was observed under polarization −0.5 V at 600°C. The comparative studies of both obtained composite Ag-BSCF materials were performed in hydrogen-oxygen IT-SOFC involving samariadoped ceria as an electrolyte and Ni-Gd 0.2 Ce 0.8 O 1.9 anode. In both cases, the addition of silver to the cathode caused an increase in current and power density compared with an IT-SOFC built with the same components but involving a monophase BSFC cathode material.

show abstract

Section: Introductionmentioning

confidence: 99%

“…These measurements have been performed using point electrodes [5,6,15,18,[52][53][54], porous electrodes in a symmetrical cell [55][56][57][58][59], or three-electrode setup [60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Composite cathode materials Ag-Ba0.5Sr0.5Co0.8Fe0.2O3 for solid oxide fuel cells

Mosiałek

Dudek

Michna

et al. 2014

J Solid State Electrochem

View full text Add to dashboard Cite

show abstract

“…Several materials have been considered for the electrolyte [2], including: yttria-stabilized zirconia (ZrO 2 + 8 mol% Y 2 O 3 , YSZ), which is the preferred electrolyte for high temperatures (800-1,000 C); samarium doped-ceria (Sm 0.2 Ce 0.8 O 2- , SDC) or gadolinium doped-ceria (Gd 0.1 Ce 0.9 O 2- , GDC) for intermediate and low temperature SOFC [2]; and lanthanum gallate doped with strontium and magnesium (La 0. 8 [3][4][5][6]. Many lanthanum-based compounds react with YSZ forming an insulating layer of La 2 Zr 2 O 7 [1] but this problem can be prevented by using, for example, a ceria-based interlayer [7,8].…”

mentioning

confidence: 99%

Direct Utilization of Liquid Fuels in SOFC for Portable Applications: Challenges for the Selection of Alternative Anodes

2009

View full text Add to dashboard Cite

Solid oxide fuel cells (SOFC) have the advantage of being able to operate with fuels other than hydrogen. In particular, liquid fuels are especially attractive for powering portable applications such as small power generators or auxiliary power units, in which case the direct utilization of the fuel would be convenient. Although liquid fuels are easier to handle and transport than hydrogen, their direct use in SOFC can lead to anode deactivation due to carbon formation, especially on traditional nickel/yttria stabilized zirconia (Ni/YSZ) anodes. Significant advances have been made in anodic materials that are resistant to carbon formation but often these materials are less electrochemically active than Ni/YSZ. In this review the challenges of using liquid fuels directly in SOFC, in terms of gas-phase and catalytic reactions within the anode chamber, will be discussed and the alternative anode materials so far investigated will be compared.

show abstract

“…The oxygen permeation process through these membranes involves oxygen exchange on the membrane surfaces and migration of oxygen anions through the crystal lattice via oxygen vacancies until to reach the opposite side and the exchange reverse process occurs [1][2][3][4][5] . In particular, the BSCF perovskite is known by its high oxygen diffusivity and extremely low surface resistance to oxygen reduction, and incorporation into crystal lattice 1,2,[6][7][8] . While the search for novel materials with improved transport and mechanical properties have been continued, research efforts were also directed towards optimization of the membrane architecture.…”

Section: Introductionmentioning

confidence: 99%

Microwave Assisted Synthesis and Sintering of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Perovskite

Nuernberg

Morelli

2015

Mat. Res.

View full text Add to dashboard Cite

Ba0.5Sr0.5Co0.8Fe0.2O3−δ thin film microelectrodes investigated by impedance spectroscopy

Cited by 178 publications

References 14 publications

Composite cathode materials Ag-Ba0.5Sr0.5Co0.8Fe0.2O3 for solid oxide fuel cells

Composite cathode materials Ag-Ba0.5Sr0.5Co0.8Fe0.2O3 for solid oxide fuel cells

Direct Utilization of Liquid Fuels in SOFC for Portable Applications: Challenges for the Selection of Alternative Anodes

Microwave Assisted Synthesis and Sintering of Ba0.5Sr0.5Co0.8Fe0.2O3-δ Perovskite

Contact Info

Product

Resources

About